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Optional many-to-one relation....

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demol

Post subject: Optional many-to-one relation....

Posted: Thu Mar 01, 2007 11:51 am

Beginner

Joined: Wed Jun 28, 2006 2:03 pm
Posts: 22

Hibernate version:
NHibernate 1.2.0.CR1

Mapping documents:

...
<many-to-one name="Person" column="PersonID" class="BLL.Person,BLL" cascade="none" />
...

In my BD the Foreign key PersonID is optional ...
So, sometimes I dont set the Person object ... And when I call saveOrUpdate I got the following error:

object references an unsaved transient instance - save the transient instance before flushing: BLL.Person

When I set the Person ID all works fine....

Any help
?

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demol

Post subject:

Posted: Tue Mar 06, 2007 9:17 am

Beginner

Joined: Wed Jun 28, 2006 2:03 pm
Posts: 22

any help???

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s1mm0t

Post subject:

Posted: Tue Jun 26, 2007 10:50 am

Beginner

Joined: Tue Sep 19, 2006 11:26 am
Posts: 33

I realise this is an old post, but in case you are still waiting for a reply or it helps anyone else...

Whenever I have had this problem it is because the constructor I was calling created an instance of the referenced object, rather than setting it to null:

Code:

public class BD
{
    private Int64 id;
    private Person person;

    public BD()
    {
        this.person = new Person(); // Change this to this.person = null;
    }

    // Getters and setters etc ....

}

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